generate missing .SRCINFO

.SRCINFO

+pkgbase = lxsession
+	pkgdesc = Lightweight X11 session manager
+	pkgver = 0.5.5
+	pkgrel = 2
+	epoch = 1
+	url = https://lxde.org/
+	arch = x86_64
+	license = GPL2
+	makedepends = intltool
+	makedepends = docbook-xsl
+	makedepends = vala
+	depends = gtk2
+	depends = gtk3
+	depends = polkit
+	depends = which
+	conflicts = lxpolkit
+	source = https://downloads.sourceforge.net/lxde/lxsession-0.5.5.tar.xz
+	sha256sums = e43e0d9c033095559ab57c8821c2b84fea58009d267db1324d32dca8bd4dbb46
+
+pkgname = lxsession
+	groups = lxde
+	depends = gtk2
+	depends = polkit
+	replaces = lxpolkit
+
+pkgname = lxsession-gtk3
+	pkgdesc = Lightweight X11 session manager (GTK+ 3 version)
+	groups = lxde-gtk3
+	depends = gtk3
+	depends = polkit
+	conflicts = lxpolkit
+	conflicts = lxsession